Surface cleaning apparatus and tray

ABSTRACT

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.17/122,664, filed Dec. 15, 2020, now allowed, which is a continuation ofU.S. patent application Ser. No. 17/119,300, filed Dec. 11, 2020, whichis a continuation of International Application No. PCT/US2019/038423filed Jun. 21, 2019, which claims the benefit of U.S. Provisional PatentApplication No. 62/688,439, filed Jun. 22, 2018, and the benefit of U.S.Provisional Patent Application No. 62/789,661, filed Jan. 8, 2019, allof which are incorporated herein by reference in their entirety.

BACKGROUND

Multi-surface vacuum cleaners are adapted for cleaning hard floorsurfaces such as tile and hardwood and soft floor surfaces such ascarpet and upholstery. Some multi-surface vacuum cleaners comprise afluid delivery system that delivers cleaning fluid to a surface to becleaned and a fluid recovery system that extracts spent cleaning fluidand debris (which may include dirt, dust, stains, soil, hair, and otherdebris) from the surface. The fluid delivery system typically includesone or more fluid supply tanks for storing a supply of cleaning fluid, afluid distributor for applying the cleaning fluid to the surface to becleaned, and a fluid supply conduit for delivering the cleaning fluidfrom the fluid supply tank to the fluid distributor. An agitator can beprovided for agitating the cleaning fluid on the surface. The fluidrecovery system typically includes a recovery tank, a nozzle adjacentthe surface to be cleaned and in fluid communication with the recoverytank through a working air conduit, and a source of suction in fluidcommunication with the working air conduit to draw the cleaning fluidfrom the surface to be cleaned and through the nozzle and the workingair conduit to the recovery tank. Other multi-surface cleaningapparatuses include “dry” vacuum cleaners which can clean differentsurface types, but do not dispense or recover liquid.

BRIEF DESCRIPTION

An aspect of the disclosure relates to a surface cleaning apparatus,comprising a housing including an upright assembly with a batteryhousing and a handle, and a base assembly moveably mounted to theupright assembly via a joint assembly, the base assembly including anozzle assembly selectively coupled to the base assembly, the nozzleassembly comprising a suction nozzle, a recovery system comprising thesuction nozzle, a suction source in fluid communication with the suctionnozzle for generating a working air stream, and a recovery tank that isselectively removable from the upright assembly, a brushroll providedwith the base assembly, the brushroll removable from the base assembly,when the brushroll is provided with the based assembly, the brushroll isrotatable about a brushroll axis, a brushroll motor provided in the baseassembly and operably coupled to the brushroll, the brushroll motoradapted to provide a driving force to rotate the brushroll about thebrushroll axis, a fluid delivery system comprising a supply tank that isselectively removable from the upright assembly, a pump, and at leastone fluid distributor, the at least one fluid distributor provided onthe base assembly, a rechargeable battery selectively receivable withinthe battery housing such that it is located vertically lower than atleast one of the supply tank or the recovery tank, the rechargeablebattery configured to selectively supply power to the suction source,the pump, and the brushroll motor, and at least one charging contactprovided on an exterior of the battery housing.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1 is a perspective view of a surface cleaning apparatus accordingto an aspect of the disclosure.

FIG. 2 is a cross-sectional view of the surface cleaning apparatusthrough line II-II of FIG. 1.

FIG. 3 is an exploded perspective view of a handle assembly of thesurface cleaning apparatus of FIG. 1.

FIG. 4 is an exploded perspective view of a body assembly of the surfacecleaning apparatus of FIG. 1.

FIG. 5 is an exploded perspective view of a motor assembly of thesurface cleaning apparatus of FIG. 1.

FIG. 6 is an exploded perspective view of a clean tank assembly of thesurface cleaning apparatus of FIG. 1.

FIG. 7 is an exploded perspective view of a dirty tank assembly of thesurface cleaning apparatus of FIG. 1.

FIG. 8 is an exploded perspective view of a foot assembly of the surfacecleaning apparatus of FIG. 1.

FIG. 9 is a perspective view of a brushroll of the surface cleaningapparatus of FIG. 1.

FIG. 10 is a close-up sectional view through a forward section of asuction nozzle assembly of the surface cleaning apparatus of FIG. 1.

FIG. 11 is a perspective view of the underside of the suction nozzleassembly, with portions cut away to show internal features of thesuction nozzle assembly.

FIG. 12 is a bottom perspective view of the foot assembly of suctionnozzle assembly FIG. 1.

FIG. 13A is a perspective view of a lens cover of the suction nozzleassembly.

FIG. 13B is an exploded perspective view of the suction nozzle assembly.

FIG. 14 is a partially exploded view of the foot assembly.

FIG. 15 is a cross-sectional view of the foot assembly of FIG. 1 throughline XV-XV of FIG. 1 and includes an enlarged view of section A, showinga fluid dispenser of the surface cleaning apparatus of FIG. 1.

FIG. 16A is a schematic diagram of a fluid delivery pathway of thesurface cleaning apparatus of FIG. 1.

FIG. 16B is a schematic diagram of a fluid recovery pathway of thesurface cleaning apparatus of FIG. 1.

FIG. 17 is a rear perspective view of the surface cleaning apparatus ofFIG. 1 with portions removed to show a conduit assembly.

FIG. 18 is a schematic circuit diagram of the surface cleaning apparatusof FIG. 1.

FIG. 19 is a perspective view of a storage tray to receive the surfacecleaning apparatus of FIG. 1 and at least one extra brushroll.

FIG. 20 is a side view of the surface cleaning apparatus docked withinthe storage tray of FIG. 19 according to various aspects describedherein.

FIG. 21 is a perspective view of the storage tray of FIG. 19 accordingto various aspects described herein.

FIG. 22 is a rear, perspective view of the handle assembly of thesurface cleaning apparatus according to various aspects describedherein.

FIG. 23 is a rear, perspective view of the battery housing according tovarious aspects described herein.

FIG. 24 is a rear, perspective view of the battery housing according tovarious aspects described herein.

FIG. 25 is an exploded view of the charging unit of the storage tray ofFIG. 20 according to various aspects described herein.

FIG. 26 is a cutaway view of the charging unit of the storage tray ofFIG. 20 according to various aspects described herein.

FIG. 27 is a cutaway view of the charging unit of the storage tray ofFIG. 20 according to various aspects described herein.

FIG. 28 is a rear view of the surface cleaning apparatus batteryaccording to various aspects described herein.

FIG. 29 is a schematic view of an autonomous vacuum cleaner according tovarious aspects described herein.

FIG. 30 is a perspective view of the autonomous vacuum cleaner of FIG.29 according to various aspects described herein.

FIG. 31 is an exploded view of a portion of the autonomous vacuumcleaner of FIG. 30 according to various aspects described herein.

FIG. 32 is a perspective view of a storage tray for the surface cleaningapparatus of FIG. 29 according to various aspects described herein.

FIG. 33 is a perspective view of a surface cleaning apparatus accordingto another aspect of the disclosure.

FIG. 34 is a cross-sectional view of the surface cleaning apparatus ofFIG. 33 taken through line 34-34.

FIG. 35 is an enlarged perspective view of the surface cleaningapparatus of FIG. 33 docked with a storage tray.

FIG. 36 is an enlarged cross-sectional view of a lower portion of thesurface cleaning apparatus docked with the storage tray, taken throughline 36-36 of FIG. 19.

FIG. 37 is an enlarged cross-sectional view of a lower portion of thesurface cleaning apparatus.

FIG. 38 is an enlarged cross-sectional view of a portion of the storagetray showing a shielded electrical contact of the tray.

FIGS. 39-41 illustrate a docking operation of the surface cleaningapparatus with the storage tray.

FIG. 42 is a perspective view of the storage tray from FIG. 35.

FIG. 43 is a block diagram for the surface cleaning apparatus, showing acondition when the surface cleaning apparatus is docked with the storagetray for recharging.

FIG. 44 shows the block diagram of FIG. 43 in a condition when thesurface cleaning apparatus is docked with the storage tray in aself-cleaning mode.

FIG. 45 is a flow chart showing one example of a self-cleaning methodfor the surface cleaning apparatus.

DETAILED DESCRIPTION

Aspects of the disclosure generally relate to a cordless surfacecleaning apparatus, which may be in the form of a multi-surface wetvacuum cleaner.

FIG. 1 is a perspective view illustrating one non-limiting example of asurface cleaning apparatus in the form of multi-surface wet surfacecleaning apparatus 10, according to one example of the invention. Asillustrated herein, the multi-surface wet surface cleaning apparatus 10is an upright multi-surface wet vacuum cleaner having a housing thatincludes an upright body or handle assembly 12 and a base 14 pivotallyand/or swivel mounted to the upright handle assembly 12 and adapted formovement across a surface to be cleaned. For purposes of descriptionrelated to the figures, the terms “upper,” “lower,” “right,” “left,”“rear,” “front,” “vertical,” “horizontal,” “inner,” “outer,” andderivatives thereof shall relate to the invention as oriented in FIG. 1from the perspective of a user behind the multi-surface wet surfacecleaning apparatus 10, which defines the rear of the multi-surface wetsurface cleaning apparatus 10. However, it is to be understood that theinvention may assume various alternative orientations, except whereexpressly specified to the contrary.

The upright handle assembly 12 includes an upper handle 16 and a frame18. Upper handle 16 includes a handle assembly 100. Frame 18 includes amain support section or body assembly 200 supporting at least a cleantank assembly 300 and a dirty tank assembly 400, and may further supportadditional components of the handle assembly 12. The base 14 includes afoot assembly 500. The multi-surface wet surface cleaning apparatus 10can include a fluid delivery or supply pathway, including and at leastpartially defined by the clean tank assembly 300, for storing cleaningfluid and delivering the cleaning fluid to the surface to be cleaned anda fluid recovery pathway, including and at least partially defined bythe dirty tank assembly 400, for removing the spent cleaning fluid anddebris from the surface to be cleaned and storing the spent cleaningfluid and debris until emptied by the user.

A pivotable swivel joint assembly 570 is formed at a lower end of theframe 18 and moveably mounts the base 14 to the upright assembly 12. Inthe example shown herein, the base 14 can pivot up and down about atleast one axis relative to the upright assembly 12. The pivotable swiveljoint assembly 570 can alternatively include a universal joint, suchthat the base 14 can pivot about at least two axes relative to theupright assembly 12. Wiring and/or conduits supplying air and/or liquidbetween the base 14 and the upright assembly 12, or vice versa, canextend though the pivotable swivel joint assembly 570. A swivel lockingmechanism 586 (FIG. 2) can be provided to lock and/or release the swiveljoint assembly 570 for movement.

FIG. 2 is a cross-sectional view of the surface cleaning apparatus 10through line II-II FIG. 1 according to one aspect of the presentdisclosure. The handle assembly 100 generally includes a handgrip 119and a user interface assembly 120. In other examples, the user interfaceassembly 120 can be provided elsewhere on the surface cleaning apparatus10, such as on the body assembly 200. In the present example, handleassembly 100 further includes a hollow handle pipe 104 that extendsvertically and connects the handle assembly 100 to the body assembly200. The user interface assembly 120 can be any configuration ofactuating controls such as but not limited to buttons, triggers,toggles, switches, or the like, operably connected to systems in theapparatus 10 to affect and control function. In the present example, atrigger 113 is mounted to the handgrip 119 and operably communicateswith the fluid delivery system of the surface cleaning apparatus 10 tocontrol fluid delivery from the surface cleaning apparatus 10. Otheractuators, such as a thumb switch, can be provided instead of thetrigger 113.

The lower end of handle pipe 104 terminates into the body assembly 200in the upper portion of the frame 18. Body assembly 200 generallyincludes a support frame to support the components of the fluid deliverysystem and the recovery system described for FIG. 1. In the presentexample, body assembly 200 includes a central body 201, a front cover203 and a rear cover 202. Additionally, a battery housing 24 (FIG. 20)can be coupled with the body assembly 200. Front cover 203 can bemounted to central body 201 to form a front cavity 235. Rear cover 202can be mounted to central body 201 to form a rear cavity 240. A motorhousing assembly 250 can be mounted to an upper portion of the frontcover 203. A carry handle 78 can be disposed on the body assembly,forwardly of the handle assembly 100, at an angle relative to the hollowhandle pipe 104 to facilitate manual lifting and carrying of themulti-surface wet surface cleaning apparatus 10. Motor housing assembly250 further includes a cover 206 disposed beneath carry handle 78, alower motor bracket 233, and a suction motor/fan assembly 205 positionedbetween the cover 206 and the motor bracket 233 in fluid communicationwith the dirty tank assembly 400.

Rear cavity 240 includes a receiving support 223 at the upper end ofrear cavity 240 for receiving the clean tank assembly 300, and a pumpassembly 140 beneath and in fluid communication with the clean tankassembly 300.

Clean tank assembly 300 can be mounted to the frame 18 in anyconfiguration. In the present example, clean tank assembly 300 isremovably mounted to the body assembly 200 such that it partially restsin the upper rear portion of the central body 201 of body assembly 200and can be removed for filling and/or cleaning.

Dirty tank assembly 400 can be removably mounted to the front of thebody assembly 200, below the motor housing assembly 250, and is in fluidcommunication with the suction motor/fan assembly 205 when mounted tothe surface cleaning apparatus 10. A flexible conduit hose 518 couplesthe dirty tank assembly 400 to the foot assembly 500 and passes throughthe swivel joint assembly 570.

Optionally, a heater (not shown) can be provided for heating thecleaning fluid prior to delivering the cleaning fluid to the surface tobe cleaned. In one example, an in-line heater can be located downstreamof the clean tank assembly 300, and upstream or downstream of the pumpassembly 140. Other types of heaters can also be used. In yet anotherexample, the cleaning fluid can be heated using exhaust air from amotor-cooling pathway for the suction motor/fan assembly 205.

Foot assembly 500 includes a removable suction nozzle assembly 580 thatcan be adapted to be adjacent the surface to be cleaned as the base 14moves across the surface and is in fluid communication with dirty tankassembly 400 through flexible conduit 518. An agitator 546 can beprovided in suction nozzle assembly 580 for agitating the surface to becleaned. Some examples of agitators include, but are not limited to, ahorizontally-rotating brushroll, dual horizontally-rotating brushrolls,one or more vertically-rotating brushrolls, or a stationary brush. Apair of rear wheels 539 are positioned for rotational movement about acentral axis on the rearward portion of the foot assembly 500 formaneuvering the multi-surface wet surface cleaning apparatus 10 over asurface to be cleaned.

In the present example, agitator 546 can be a hybrid brushrollpositioned within a brushroll chamber 565 for rotational movement abouta central rotational axis, which is discussed in more detail below. Asingle brushroll 546 is illustrated; however, it is within the scope ofaspects described herein for dual rotating brushrolls to be used.Moreover, it is within the scope of aspects described herein for thebrushroll 546 to be mounted within the brushroll chamber 565 in a fixedor floating vertical position relative to the chamber 565.

FIG. 3 is an exploded perspective view of the handle assembly 100.Handgrip 119 can include a front handle 101 and a back handle 102 matedfixedly to the handle pipe 104. The user interface assembly 120 can beprovided on the front handle 101. The user interface assembly 120 of theillustrated example includes a control panel 111 connected to a floatingkey 109 and mounted with a water proof seal 108 through the frontportion of front handle 101 to engage a printed circuit board assembly(PCBA) 110 and a bracket 112 provided on the back side of front handle101. Bracket 112 engages a spring 114 that biases the trigger 113mounted to the back handle 102, with a portion of the trigger 113projecting inward in the recess formed by the mating of front handle 101to back handle 102. The trigger 113 can electronically communicate withthe fluid delivery system. The trigger 113 alternatively canmechanically communicate with the fluid delivery system, such as via apush rod (not shown) that runs through the handle pipe 104. Hollowhandle pipe 104 terminates in the frame 18 (FIG. 1) by a bracketconnection formed by a right bracket 106, a left bracket 105, and afemale connector 107 joined together at the terminal end of handle pipe104.

FIG. 4 is an exploded perspective view of the body assembly 200. Bodyassembly 200 includes front cover 203, central body 201, and rear cover202, and terminates with a bottom cover 216. Front cover 203 and rearcover 202 can mount to central body 201 forming at least partiallyenclosed cavities 235 and 240. In the present example, front cavity 235generally contains electrical components such as a printed circuit board217 (PCB) and other required circuitry 215 electrically connected tovarious component parts of the fluid delivery and recovery systems. Pumpassembly 140 can include a connector 219, a pump 226, a clamp 220 and agasket 218 and can be mounted in front cavity 235. Alternatively, pumpassembly 140 can be mounted in rear cavity 240, or partially mounted inboth front and rear cavities 235 and 240 respectively. The pump 226 canbe a solenoid pump having a single, dual, or variable speed.

In the present example, rear cavity 240 generally contains a receivingassembly 245 for the clean tank assembly 300 (FIG. 2). Receivingassembly 245 can include the receiving support 223, a spring insert 227,a clamp 224, a receiving body 222, a receiving gasket 231 and a clampcover 225 at the upper portion of rear cavity 240 for receiving theclean tank assembly 300. The pump assembly 140 can be mounted beneathand in fluid communication with the receiving assembly 245.

FIG. 5 is an exploded perspective view of the motor housing assembly250. Carry handle 78 includes a handle top 209 mounted to a handlebottom 207 with a gasket 230 mounted therebetween, and is secured to thecover 206. Motor housing assembly 250 can further include an upper motorhousing body 204 and a lower motor housing body 208, and a vacuum motorcover 228 provided therebetween to partially enclose the suctionmotor/fan assembly 205. A top motor gasket 229 and a rubber gasket 221are provided on the upper portion of the suction motor/fan assembly 205,and lower vacuum motor gaskets 210 and 211 are provided on the lowerportion of the suction motor/fan assembly 205. A clean air outlet of theworking air path through the vacuum cleaner can be defined by a leftvent 213 and a right vent 214 in the lower motor housing body.

FIG. 6 is an exploded perspective view of the clean tank assembly 300.Clean tank assembly 300 generally includes at least one supply tank 301and a supply valve assembly 320 controlling fluid flow through an outlet311 of the supply tank 301. Alternatively, clean tank assembly 300 caninclude multiple supply chambers, such as one chamber containing waterand another chamber containing a cleaning agent. A check valve 310 and acheck valve umbrella 309 can be provided on supply tank 301. Supplyvalve assembly 320 mates with the receiving assembly 245 and can beconfigured to automatically open when seated. The supply valve assembly320 includes an assembly outlet 302 that is mounted to the outlet of thefluid supply tank 301 by a threadable cap 303, a rod release insert 304held in place with the assembly outlet 302 by an O-ring 305, and aninsert spring 308 inside a spring housing 306 biasing the valve assembly320 to a closed position. When the valve assembly 320 is coupled withthe receiving assembly 245, the valve assembly 320 opens to releasefluid to the fluid delivery pathway. A screen mesh insert 307 can beprovided between the tank outlet and the valve outlet to preventparticulates of a certain size from entering the pump assembly 140.

FIG. 7 is an exploded perspective view of the dirty tank assembly 400.The dirty tank assembly 400 generally includes the collection containerfor the fluid recovery system. In the present example, dirty tankassembly 400 includes a recovery tank 401 with an integral hollowstandpipe 420 (FIG. 2) formed therein. The standpipe 420 is orientedsuch that it is generally coincident with a longitudinal axis of therecovery tank 401. The standpipe 420 forms a flow path between an inlet422 (FIG. 2) formed at a lower end of the recovery tank 401 and anoutlet 423 (FIG. 2) on the interior of the recovery tank 401. When therecovery tank 401 is mounted to the body assembly 200 (FIG. 2), theinlet 422 is aligned with the flexible conduit hose 518 to establishfluid communication between the foot assembly 500 and the recovery tank401. A lid 402 sized for receipt on the recovery tank 401 supports apleated filter 405 in a filter cover plate 403 mounted to the lid 402with a mesh screen 406 therebetween. Preferably, the pleated filter 405is made of a material that remains porous when wet. The surface cleaningapparatus 10 can also be provided with one or more additional filtersupstream or downstream. A gasket 411 positioned between mating surfacesof the lid 402 and the recovery tank 401 creates a seal therebetween forprevention of leaks.

A shut-off valve can be provided for interrupting suction when fluid inthe recovery tank 401 reaches a predetermined level. The shut-off valveincludes a float bracket 412 fixedly attached to a bottom wall 416 ofthe lid 402 in a position offset from the standpipe 420 and a moveablefloat 410 carried by the float bracket 412. The float 410 is buoyant andoriented so that the top of the float 410 can selectively seal an airoutlet 415 of the recovery tank 401 leading to the downstream suctionsource when the fluid in the recovery tank 401 reaches a predeterminedlevel.

A releasable latch 430 is provided to facilitate removal of the dirtytank assembly 400 for emptying and/or cleaning, and can be positioned inan aperture 417 on a front side of the lid 402. The releasable latch 430can include a latch button 407 held within a latch bracket 404 andbiased with latch spring 408 toward an engaged or latched position. Thelatch button 407 releasably engages with the front cover 203 toremovably secure the dirty tank assembly 400 to the body assembly 200(FIG. 2). A hand grip 419 can be provided on the recovery tank 401 andlocated below the latch 407 to facilitate handling of the dirty tankassembly 400 g.

FIG. 8 is an exploded perspective view of the foot assembly 500. Footassembly 500 generally includes a housing supporting at least some ofthe components of the fluid delivery system and fluid recovery system.In the present example, the housing includes an upper cover 542 and alower cover 501 coupled with the upper cover 542 and defining apartially enclosed cavity 561 therebetween for receiving at least somecomponents of the fluid delivery and recovery pathways. The housing canfurther include a cover base 537 coupled with a lower forward portion ofthe lower cover to defined a portion of the brushroll chamber 565 (FIG.10). The upper cover 542 extends from approximately the middle to rearof foot assembly 500 and can have decorative panels 543 and 544 mountedto an upper surface. Upper cover 542 can be configured to releasablyreceive the suction nozzle assembly 580.

Suction nozzle assembly 580 can be configured to include at least oneinlet nozzle for recovering fluid and debris from the surface to becleaned and at least one outlet for delivering fluid to the surface tobe cleaned. In one example, suction nozzle assembly 580 can include anozzle housing 551 and a nozzle cover 552, which mate to form a pair offluid delivery channels 40 therebetween that are each fluidly connectedto a spray connector 528 at one terminal end. At the opposite, or secondterminal, end of each fluid delivery channel 40, a fluid dispenser 554is configured with at least one outlet to deliver fluid to the surfaceto be cleaned. Fluid dispenser 554 may be include of one or more spraytips configured to deliver cleaning fluid from the fluid deliverychannel 40 to the brush chamber 565. In the present example, fluiddispenser 554 is a pair of spray tips fluidly connected to the fluiddelivery channel 40. Spray tip 554 is mounted in the nozzle housing 551and has an outlet in fluid communication with the brush chamber 565.Nozzle cover 552 can have a decorative cover 553, and one or both can becomposed of a translucent or transparent material. Nozzle housing 551can further include a front interference wiper 560 mounted at a forwardposition relative to the brushroll chamber 565 and disposedhorizontally.

The lower cover 501 further includes a plurality of upstanding bosses562 that project into cavity 561 for mounting interior componentsthereto. A rear portion of the lower cover 501 pivotally mounts toswivel joint assembly 570 for maneuvering the multi-surface wet surfacecleaning apparatus 10 over a surface to be cleaned. The rear wheels 539are positioned for rotational movement about a central axis on oppositesides of the lower cover 501 for maneuvering the multi-surface wetsurface cleaning apparatus 10 over a surface to be cleaned. Swivel jointassembly 570 can include swivel joint 519, covers 520 and 521, and aswivel locking mechanism 586 for releasing the swivel joint assembly 570for pivoting and swivel movements.

A conduit assembly 585 is partially disposed in cavity 561 and extendsthrough the swivel joint 519, along with the flexible conduit hose, tocouple with components in the upper body assembly 200 (FIG. 2). Conduitassembly 585 includes a fluid supply conduit 532 and a wiring conduit533. Fluid supply conduit 532 passes interiorly to swivel joint assembly570 and fluidly connects the clean tank assembly 300 to the sprayconnectors 528 through a T-connector 530 having a pair spray tubeconnectors 531. Wiring conduit 533 provides a passthrough for electricalwiring from the upright assembly 12 to the base 14 through swivel jointassembly 570. For example, the wiring can be used to supply electricalpower to at least one electrical component in the foot assembly 500. Oneexample of an electrical component is a brush motor 503. Another exampleis an indicator light assembly. In the present example, the indicatorlight assembly includes an LED base 516 configured to mount a pair ofindicator lights 517 and a pair of lenses 545 over the lights 517. Thelights 517 may include light emitting diodes (LED) or other illuminationsources.

A central lower portion of the partially enclosed cavity 561 and arearward lower portion of suction nozzle assembly 580 can be molded toform a foot conduit 564 of the fluid recovery pathway that is fluidlyconnected to the flexible conduit 518. Flexible conduit 518 fluidlyconnects dirty tank assembly 400 (FIG. 2) to suction nozzle assembly580.

The brushroll 546 can be provided at a forward portion of the lowercover 501 and received in brushroll chamber 565. In the present example,the cover base 537 rotatably receives the brushroll 546, and alsomountably receives a wiper 538 positioned rearwardly of the brushroll546. Optionally, brushroll 546 can be configured to be removed by theuser from the foot assembly 500 for cleaning and/or drying. A pair offorward wheels 536 are positioned for rotational movement about acentral axis on the terminal surface of the cover base 537 formaneuvering the multi-surface wet surface cleaning apparatus 10 over asurface to be cleaned.

In the example, the brushroll 546 can be operably coupled to and drivenby a drive assembly including a dedicated brush motor 503 disposed inthe cavity 561 of the lower cover 501 and one or more belts, gears,shafts, pulleys or combinations thereof to provide the coupling. Here, atransmission 510 operably connects the motor 503 to the brushroll 546for transmitting rotational motion of a motor shaft 505 to the brushroll546. In the present example, transmission 510 can include a drive belt511 and one or more gears, shafts, pulleys, or combinations thereof.Alternatively, a single motor/fan assembly (not shown) can provide bothvacuum suction and brushroll rotation in the multi-surface wet surfacecleaning apparatus 10. A brush motor exhaust tube 515 can be provided tothe brush motor 503 and configured to exhaust air to the outside of themulti-surface wet surface cleaning apparatus 10.

FIG. 9 is a perspective view of the hybrid brushroll 546. Hybridbrushroll 546 is suitable for use on both hard and soft surfaces, andfor wet or dry vacuum cleaning. In this exemplary aspect, brushroll 546includes a dowel 46, a plurality of tufted bristles 48 or unitarybristle strips extending from the dowel 46, and microfiber material 49provided on the dowel 46, arranged between the bristles 48. Dowel 46 canbe constructed of a polymeric material such as acrylonitrile butatdienestyrene (ABS), polypropylene or styrene, or any other suitable materialsuch as plastic, wood, or metal. Bristles 48 can be tufted or unitarybristle strips and constructed of nylon, or any other suitable syntheticor natural fiber. The microfiber material 49 can be constructed ofpolyester, polyamides, or a conjugation of materials includingpolypropylene or any other suitable material known in the art from whichto construct microfiber.

In one non-limiting example, dowel 46 is constructed of ABS and formedby injection molding in one or more parts. Bristle holes (not shown) canbe formed in the dowel 46 by drilling into the dowel 46 after molding,or can be integrally molded with the dowel 46. The bristles 48 aretufted and constructed of nylon with a 0.15 mm diameter. The bristles 48can be assembled to the dowel 46 in a helical pattern by pressingbristles 48 into the bristle holes and securing the bristles 48 using afastener (not shown), such as, but not limited to, a staple, wedge, oranchor. The microfiber material 49 is constructed of multiple strips ofpolyester treated with Microban© and glued onto the dowel 46 betweenbristles 48. Alternatively, one continuous microfiber strip 49 can beused and sealed by hot wire to prevent the single strip from detachingfrom the dowel 46. The polyester material can be 7-14 mm thick withweight of 912 g/m². The polyester material can be an incipientabsorption of 269 wt % and a total absorption of 1047 wt %.

FIG. 10 is a close-up sectional view through a forward section of thesuction nozzle assembly 580. The brushroll 546 is positioned forrotational movement in a direction R about a central rotational axis X.The suction nozzle assembly 580 includes a suction nozzle 594 definedwithin the brush chamber 565 that is in fluid communication with thefoot conduit 564 and configured to extract liquid and debris from thebrushroll 546 and the surface to be cleaned. The suction nozzle 594defines a dirty air inlet of the working air path or recovery pathwaythrough the vacuum cleaner. Suction nozzle 594 is further fluidlyconnected through the foot conduit 564 and the flexible hose conduit518, to dirty tank assembly 400 (see FIG. 16B). Front interference wiper560, mounted at a forward position of the nozzle housing 551, isprovided in the brush chamber 565, and is configured to interface with aleading portion of the brushroll 546, as defined by the direction ofrotation R of the brushroll 546. Spray tips 554 are mounted to thenozzle housing 551 with an outlet in the brushroll chamber 565 andoriented to spray fluid inwardly onto the brushroll 546. The wettedportion brushroll 546 then rotates past the interference wiper 560,which scrapes excess fluid off the brushroll 546, before reaching thesurface to be cleaned. Rear wiper squeegee 538 is mounted to the coverbase 537 behind the brushroll 546 and is configured to contact thesurface as the base 14 moves across the surface to be cleaned. The rearwiper squeegee 538 wipes residual liquid from the surface to be cleanedso that it can be drawn into the fluid recovery pathway via the suctionnozzle 594, thereby leaving a moisture and streak-free finish on thesurface to be cleaned.

Front interference wiper 560 and rear wiper 538 can be squeegeesconstructed of a polymeric material such as polyvinyl chloride, a rubbercopolymer such as nitrile butadiene rubber, or any material known in theart of sufficient rigidity to remain substantially undeformed duringnormal use of the surface cleaning apparatus 10, and can be smooth oroptionally include nubs on the ends thereof. Wiper 560 and wiper 538 canbe constructed of the same material in the same manner or alternativelyconstructed of different materials providing different structurecharacteristics suitable for function.

FIG. 11 is a perspective view of the underside of the suction nozzleassembly 580, with some portions cut away to show some internal featuresof the suction nozzle assembly 580. Brushroll chamber 565 is defined onthe underside of suction nozzle assembly 580 forward of the foot conduit564. A pair of spray tip outlets 595 can be provided in the brushchamber 565. A latch mechanism 587 is provided at the rearward portionof suction nozzle assembly 580 and is configured to be received in theupper cover 542 (FIG. 8). Latch mechanism 587 can be received in a latchreceiving depression 587 a (FIG. 8) provided on the upper cover 542 base14 and is configured for a user to remove and/or lock the suction nozzleassembly 580 onto the base 14. The suction nozzle assembly 580 can bebiased by springs 556 to release suction nozzle assembly 580 away fromfoot assembly 500 when the latch mechanism 587 is actuated. A pair ofspray connector inlets 590 are provided on the underside of nozzlehousing 551 and are fluidly connected to the first terminal end of fluiddelivery channels 40 on the upper side of the nozzle housing 551 (FIG.8). Front interference wiper 560 is provided in the forward most portionof brushroll chamber 565.

FIG. 12 is a bottom perspective view of the foot assembly 500. Rearwiper 538 is provided on the cover base 537, rearward of brushroll 546,and configured to contact the surface to be cleaned.

FIG. 13A is a perspective view of the underside of the nozzle cover 552and FIG. 13B is an exploded perspective view of the suction nozzleassembly 580. The nozzle cover 552 includes of two fluid channelportions 40 a that form an upper portion of the flow channels 40 whenmated with nozzle housing 551. The nozzle housing 551 includes two fluidchannel portions 40 b that form lower portions of the flow channels 40when mated with the nozzle cover 552. Fluid channel portions 40 a and 40b mate to form the fluid delivery flow channels 40 therebetweencontaining the spray tips 554 at the second terminal ends partiallytherein.

The nozzle housing 551 can define a lens for the brush chamber 565 andcan include a translucent or transparent material to allow the brushroll546 to be viewed therethrough. Likewise, the nozzle cover 552 can definea lens cover, and can include a translucent or transparent material,which permits a user to view the flow of fluid through the flow channels40.

FIG. 14 is a partially exploded view of the base. In FIG. 14, suctionnozzle assembly 580 is removed to expose the indicator lights 517. Theindicator lights 517 can be configured to activate in combination withthe pump assembly 140 when trigger 113 is depressed to deliver fluid(FIG. 2). A portion of the base can form a light tube or light pipe 578that is illuminated by the indicator lights 517 when fluid is delivered,indicating to the user that fluid is being delivered to the surfaceunderneath the base 14. The light pipe 578 can be any physical structurecapable of transporting or distributing light from the indicator lights517. The light pipe 578 can be a hollow structure that contain the lightwith a reflective lining, or a transparent solid structure that containthe light by total internal reflection. In the illustrated example,light pipes 578 are solid structures formed on the suction nozzleassembly 580 and are elongated to extend along the fluid deliverychannels 40 and configured to distribute of light over its length. Morespecifically, the light pipes 578 are embodied as raised rails moldedonto the surface of the nozzle cover 552, generally above the fluiddelivery channels 40.

FIG. 15 is a cross-sectional view of the foot assembly 500 through lineXV-XV of FIG. 1, with portion A enlarged for a close up view of a fluiddispenser in the form of the spray tip 554. The spray tip 554 is mountedin each of the terminal ends of each of the fluid delivery flow channels40 of the suction nozzle assembly 580 and can be configured to terminatein the brush chamber 565. Each spray tip 554 includes an orifice 595oriented to spray onto the brushroll 546 as depicted by the solid arrowsin FIG. 15. The spray tips 554 can be oriented to spray along ahorizontal axis which may be parallel to the rotational axis X of thebrushroll 546 or at a substantially horizontal angle relative to therotational axis X in order to wet the entire length of the brushroll 546during fluid dispensing. By “substantially horizontal” the angle ofspray of the orifice 595 can be 0 to 30 degrees, depending on the lengthof the brushroll and the spacing of the spray tips 554 in order to coverthe entire brushroll 546 with fluid. The angle of the spray tips 554 maybe static or adjustable while the multi-surface wet surface cleaningapparatus 10 is in operation or prior to operation. The spray tip outletorifice 595 can have any diameter suitable to deliver fluid at thedesired pressure, pattern, and/or volume from the spray tip 554. In thepresent example, spray tips 554 have an outlet orifice diameter of 1.0mm and are oriented to spray inwardly onto a top of the brushroll 546 atan angle of 15 degrees from the horizontal.

FIG. 16A is a schematic diagram of a fluid supply pathway of the surfacecleaning apparatus 10. The arrows present designate the directional flowof fluid in the fluid supply pathway according to the present example.The fluid supply pathway can include the supply tank 301 for storing asupply of fluid. The fluid can include one or more of any suitablecleaning fluids, including, but not limited to, water, compositions,concentrated detergent, diluted detergent, etc., and mixtures thereof.For example, the fluid can include a mixture of water and concentrateddetergent.

The fluid supply pathway can further include a flow control system 705for controlling the flow of fluid from the supply tank 301 to fluidsupply conduit 532. In one configuration, the flow control system 705can include pump 226, which pressurizes the system, and supply valveassembly 320, which controls the delivery of fluid to the fluid supplyconduit 532. In this configuration, fluid flows from the supply tank301, through pump 226, to the fluid supply conduit 532. A drain tube 706provides a pathway for draining any fluid that may leak from the supplytank 301 while the surface cleaning apparatus 10 is not in activeoperation to a drain hole (not pictured) in foot assembly 500 to collectin a storage tray 900 (FIG. 19). From the fluid supply conduit 532,fluid flows sequentially through the spray connectors 528, through thefluid delivery channels 40, through the spray tips 554, and onto thebrushroll 546 (FIG. 15), which applies the fluid to the surface to becleaned.

The trigger 113 (FIG. 2) can be depressed to actuate the flow controlsystem 705 and dispense fluid to the fluid dispenser 554. The trigger113 can be operably coupled to the supply valve 320 such that pressingthe trigger 113 will open the valve 320. The valve 320 can beelectrically actuated, such as by providing an electrical switch betweenthe valve 320 and a power source 22 (FIG. 18) that is selectively closedwhen the trigger 113 is pressed, thereby powering the valve 320 to moveto an open position. In one example, the valve 320 can be a solenoidvalve. The pump 226 can also be coupled with the power source 22. In oneexample, the pump 226 can be a centrifugal pump. In another example, thepump 226 can be a solenoid pump.

In another configuration of the fluid supply pathway, the pump 226 canbe eliminated and the flow control system 705 can include a gravity-feedsystem having a valve fluidly coupled with an outlet of the supplytank(s) 301, whereby when valve is open, fluid will flow under the forceof gravity to the fluid dispenser 554. The valve 320 can be mechanicallyactuated or electrically actuated, as described above.

FIG. 16B is a schematic diagram of a fluid recovery pathway of thesurface cleaning apparatus 10. The arrows present designate thedirectional flow of fluid in the fluid recovery pathway. The fluidrecovery pathway can include the suction nozzle assembly 580, the footconduit 564, the flexible conduit hose 518, the suction motor/fanassembly 205 in fluid communication the suction nozzle assembly 580 forgenerating a working air steam, and recovery tank 401 for separating andcollecting fluid and debris from the working airstream for laterdisposal. Standpipe 420 can be formed in a portion of recovery tank 401for separating fluid and debris from the working airstream. The suctionmotor/fan assembly 205 provides a vacuum source in fluid communicationwith the suction nozzle assembly 580 to draw the fluid and debris fromthe surface to be cleaned through the flexible hose conduit 518 to therecovery tank 401.

FIG. 17 is a rear perspective view of the surface cleaning apparatus 10with portions removed to show the conduit assembly 585. In the presentexample, flexible conduit hose 518 couples dirty tank assembly 400 tofoot assembly 500 through a forward portion of pivotable swivel jointassembly 570. Fluid supply conduit 532 and wiring conduit 533 can beprovided rearward of flexible conduit hose 518. Fluid supply conduit 532fluidly couples the pump 226 the T-connector 530 in the foot assembly500.

FIG. 18 is a schematic circuit diagram of the surface cleaning apparatus10. User interface assembly 120 can be operably connected to the variouscomponents of cleaner 10 directly or through a central control unit 750.User interface assembly 120 can include one or more actuators and beconfigured with any combination of buttons, switches, toggles, triggers,or the like to allow a user to select multiple cleaning modes and/orcontrol the fluid delivery and recovery systems. A power source 22, suchas a battery 22 can be electrically coupled to the electrical componentsof the surface cleaning apparatus 10, including the motors 205, 503 andpump 226. Therefore, the surface cleaning apparatus 10 can be consideredcordless. A suction power switch 25 between the suction motor/fanassembly 205 and the power source 22 can be selectively closed by theuser, thereby activating the suction motor/fan assembly 205.Furthermore, a brush power switch 27 between the brush motor 503 and thepower source 22 can be selectively closed by the user, therebyactivating the brush motor 503. User interface assembly 120 can beoperably coupled to the pump 226 such that an actuator, such as trigger113, can activate the pump 226 when engaged, thereby powering the pump226 to deliver fluid to the fluid supply pathway. Actuation of the pump226 can be operably connected to the LED lights 517 such that actuationof trigger 113 additionally powers LED indicator lights 517 to provideuser feedback that fluid is being delivered to the fluid supply pathway.

In one example, user interface assembly 120 of surface cleaningapparatus 10 can be provided with actuators 122 for selecting multiplecleaning modes to be selected by the user. Actuators 122 send a signalto the central control unit 750, which can include a PCBA. The outputfrom the central control unit 750 adjusts the frequency of the solenoidpump 226 to generate the desired flow rate depending on the modeselected. For instance, the surface cleaning apparatus 10 can have ahard floor cleaning mode and a carpet cleaning mode. In the hard floorcleaning mode, the liquid flow rate to the fluid dispenser 554 is lessthan in the carpet cleaning mode. The liquid flow rate is controlled bythe speed of the pump 226. In one non-limiting example, the speed of thepump 226 is controlled in the hard floor cleaning mode so that theliquid flow rate is approximately 50 ml/min and the speed of the pump226 is controlled in the carpet cleaning mode so that the liquid flowrate is approximately 100 ml/min. Optionally, the surface cleaningapparatus 10 can have a wet scrubbing mode in which the suctionmotor/fan assembly 205 can be inoperative while brush motor 503 isactivated so that the soiled cleaning solution is not removed from thesurface to be cleaned.

FIG. 19 is a perspective view of a storage tray 900 for the surfacecleaning apparatus 10. Storage tray 900 can be configured to receive thebase 14 of the surface cleaning apparatus 10 in an upright, storedposition. Storage tray 900 can optionally be adapted to contain a liquidfor the purposes of cleaning the interior parts of cleaner 10 and/orreceiving liquid from the drain tube 706 (FIG. 16A). In the presentexample, storage tray 900 is adapted to receive the base 14 and includesa removable brushroll holder 905 provided on an exterior side wall ofthe tray 900. Alternatively, storage tray 900 can be configured with anintegral brushroll holder 905. Here, the brushroll holder 905 can besecured to the storage tray 900 by a retention latch 910. Retentionlatch 910 can include a sliding lock, clamp, brace, or any othermechanism in which to secure brushroll holder 905 to its position onstorage tray 900 while in use and can be biased or otherwise configuredto allow a user to release a lock and remove the brushroll holder 905from storage tray 900. Brushroll holder 905 can be adapted to removablyreceive one or more brushrolls 546 for the purposes of storage and/ordrying. Brushroll holder 905 can include one or more brushroll slots 915to securely receive brushrolls 546 in a vertical fixed position fordrying and storage. Brushroll slots 915 can be fixed or adjustable andcan include clamps, rods, or molded receiving positions that canaccommodate brushroll 546 with or without the dowel 46 inserted.Alternatively, brushroll holder 905 can include a series of horizontalstorage positions such racks, hooks, or clamps (not shown) to securebrushrolls 546 in a horizontal position.

FIG. 20 is a side view of the storage tray 900 for the surface cleaningapparatus 10 more clearly illustrating a charging unit 920 provided onthe storage tray 900. The charging unit 920 can electrically couple thebattery 22 when the surface cleaning apparatus 10 base 14 is seated ontothe storage tray 900. Therefore, the storage tray 900 functions as acharging base or a charging tray. An electric coupler 921 can beprovided at the rear of the charging unit 920. The electric coupler 921can electrically couple the charging unit 920 to a power sourceincluding, but not limited to, a household outlet. In one example, acord (not shown) can be coupled with the electric coupler 921 that canconnect the electric coupler 921 to the power source.

Also better illustrated in the side view is that a battery housing 24can be provided on the handle assembly 12 to protect the battery 22 andretain the battery 22 on the surface cleaning apparatus 10. The batteryhousing 24 can be integral with the handle assembly 12 such that thebattery housing 24 forms a portion of the handle assembly 12.Alternatively, the battery housing 24 can be removably coupled with thehandle assembly 12. The battery housing 24 and the charging unit 920 ofthe storage tray 900 can include complementary shapes. In this manner,the battery housing 24 fits against the charging unit 920 in order tocouple the battery housing 24 and the charging unit 920.

FIG. 21 is a perspective view of the storage tray 900 without thesurface cleaning apparatus 10 and without the removable brushroll holder905. A self-cleaning reservoir 926 is provided on the storage tray 900for use in self-cleaning modes of the surface cleaning apparatus 10. Theself-cleaning reservoir 926 can be formed as a recess in the storagetray 900. The reservoir 926 is shaped to fit a brush roll 546 (FIG. 2)when the brush roll 546 is coupled with the surface cleaning apparatus10 and to retain a cleaning solution. Wheel holders 928 can be formed onthe storage tray 900 in order to retain the rear wheels 539 (FIG. 20).The wheel holders 928 can be formed as a recess, or groove in thestorage tray 900 and can include a wheel block 930. The wheel block 930can be a raised portion configured to prevent the rear wheels 539 fromrolling out of the wheel holders 928.

FIG. 22 shows a rear, perspective view of a lower portion of the handleassembly 12 including the battery housing 24. A battery cover 932 can bedisposed on top of the battery 22 to protect the components of thebattery 22. In the current embodiment, the battery 22 is fixed ornon-removable. A DC jack 934 having a charging contact 942 (FIG. 24) canbe provided in the battery 22 and can include a DC jack socket 936.While FIG. 22 illustrates a non-removable battery 22, it is alsopossible for aspects described herein to include a battery that can beremovable from the battery housing 24 such that the battery 22 can bereplaced, by a user, with a new battery 22 if need be.

FIG. 23 illustrates the battery 22 without the battery cover 932 inorder to more clearly show the components of the battery 22. The DC jacksocket 936 can be covered, or closed with a DC jack cover 940 by way ofa spring 938. The spring 938 can be compressed, or retained, by thebattery cover 932 (FIG. 22) when the battery cover 932 is mounted to thebattery 22. Thus, the spring 938 under compression can provide a forceon the DC jack cover 940 to hold the DC jack cover 940 in the closedposition. FIG. 23 shows the DC jack cover 940 is in the closed positionsuch that the DC jack cover 940 is in alignment with the DC jack socket936, shielding the DC jack charging contact 942 such that liquid can beprevented from entering the DC jack 934. The spring 938 is partiallycompressed and normally forces the DC jack cover 940 into the closedposition.

FIG. 24 illustrates the DC jack cover 940 in an open position, where theDC jack cover 940 is moved out of alignment with the DC jack socket 936thereby exposing the DC jack charging contact 942. To move the DC jackcover 940 from the closed position to the open position, a force canpush against a ramp 954 of the DC jack cover 940 to move, or slide, theDC jack cover 940 out of alignment with the DC jack socket 936. While aramp 954 is shown, the surface cleaning apparatus 10 can include anysuitable mating feature configurable to move the DC jack cover 940. Inthe open position, the spring 938 is further compressed.

FIG. 25 illustrates an exploded view of the charging unit 920 moreclearly showing the components of the charging unit 920. A bracket 944is provided in the charging unit 920 and includes a charger plug 946 anda plug cover 948. Springs 950 bias the plug cover 948 into a closedposition. The closed position (FIG. 26) can include covering, or closingoff the charger plug 946. FIG. 26 is a cutaway view of the charging unit920 more clearly showing the charger plug 946 covered by the plug cover948 such that the plug cover 948 shields electrical contacts (not shown)provided on the charger plug 946.

In order to dock the surface cleaning apparatus 10 within the storagetray 900 for charging, the surface cleaning apparatus 10 is lowered intothe storage tray 900 and rear lower portion 24 a (FIG. 22) of thebattery housing 24 can push against a ramp 952 on the plug cover 948,sliding the plug cover 948 rearwardly to expose the charger plug 946.While a ramp 952 is shown, the storage tray 900 can include any suitablemating feature configurable to move the plug cover 948. The rearwardlypositioned plug cover 948 and exposed charger plug 946 are illustratedin FIG. 27. As the surface cleaning apparatus 10 continues to be loweredonto the storage tray 900, the charger plug 946 is received within theDC jack socket 936 (FIG. 24). The charger plug 946 can push against theramp 954 (FIG. 24) on the DC jack cover 940 and force the DC jack cover940 to slide into the open position (FIG. 24), further compressing thespring 938, such that the DC jack charging contact 942 is exposed andcoupled with the charger plug 946 (FIG. 27). The charging plug 946 onthe storage tray 900 and DC jack 934 on the surface cleaning apparatus10 become fully engaged, or electrically connected, when the surfacecleaning apparatus 10 is fully seated on the storage tray 900, which isillustrated in FIG. 20. The DC jack socket 936 can be coupled with thecharging unit 920 in order to charge the battery 22 via the DC jack 934.FIG. 28 shows the surface cleaning apparatus 10 with the battery housing24 and storage tray 900 removed to more clearly view the charging plug946 coupled to the battery 22.

The multi-surface wet surface cleaning apparatus 10 shown in the figurescan be used to effectively his remove debris and fluid from the surfaceto be cleaned in accordance with the following method. The sequence ofsteps discussed is for illustrative purposes only and is not meant tolimit the method in any way as it is understood that the steps mayproceed in a different logical order, additional or intervening stepsmay be included, or described steps may be divided into multiple steps,without detracting from aspects described herein.

In operation, the multi-surface wet surface cleaning apparatus 10 isprepared for use by coupling the surface cleaning apparatus 10 to thepower source 22, and by filling the supply tank 301 with cleaning fluid.A user selects the floor surface type to be cleaned through userinterface assembly 120. Cleaning fluid is selectively delivered to thesurface to be cleaned via the fluid supply pathway by user-activation ofthe trigger 113, while the surface cleaning apparatus 10 is moved backand forth over the surface. Pump 226 can be activated by user interfaceassembly 120. User-activation of trigger 113 activates the pump 226 andfluid is released by clean tank assembly 300 into the fluid deliverypathway through spray tips 554 and onto brushroll 546. The wettedbrushroll 546 is wiped across the surface to be cleaned to remove dirtand debris present on the surface.

Activation of the trigger 113 also simultaneously activates LEDindicator lights 517 which transmit light through the LED lenses 545 andinto nozzle cover 552 along the light pipes 578 to provide anilluminated indication that fluid is being dispensed. The illuminationof the LEDs 517 and light pipes 578 indicate to the user the fluiddispenser 554 has been activated and fluid has been dispensed onto thesurface to be cleaned.

Simultaneously, brush power switch 27 can activate brushroll 546 toagitate or rotate cleaning fluid into the surface to be cleaned. Suchinteraction removes the adhered dirt, dust, and debris, which thenbecome suspended in the cleaning fluid. As brushroll 546 rotates, frontinterference squeegee 560 confronts brushroll 546 in a manner so as toensure the brush is wetted evenly and cleaning fluid is spread uniformlyacross the entire length of the brushroll 546. Front interferencesqueegee 560 can also be configured to simultaneously scrape soiledfluid and debris off the brushroll 546 to be drawn into the suctionnozzle assembly 580 and fluid recovery pathway. As the surface cleaningapparatus 10 moves over the surface to be cleaned, soiled cleaning fluidand dirt near the nozzle opening 594 is drawn into the suction nozzleassembly 580 and the fluid recovery pathway when suction motor/fanassembly 205 is activated. Additionally, cleaning fluid and dirt isscraped by the rear wiper squeegee 538 and drawn into the fluid recoverypathway.

Optionally, during operation of the brushroll 546, the suction motor/fanassembly 205 can be inoperative which facilitates a wet scrubbing modeso that the soiled cleaning solution is not removed as the cleaner 10 ismoved back and forth across the surface to be cleaned.

During operation of the fluid recovery pathway, the fluid anddebris-laden working air passes through the suction nozzle assembly 580and into the downstream recovery tank 401 where the fluid debris issubstantially separated from the working air. The airstream then passesthrough the suction motor/fan assembly 205 prior to being exhausted fromthe surface cleaning apparatus 10 through the clean air outlet definedby the vents 213, 214. The recovery tank 401 can be periodically emptiedof collected fluid and debris by actuating the latch 430 and removingthe dirty tank assembly 400 from the body assembly 200.

When operation has ceased, the surface cleaning apparatus 10 can belocked upright and placed into the storage tray 900 for storage orcleaning. If needed, the suction nozzle assembly 580 can be removed fromthe foot assembly 500. Brushroll 546 can then be removed from the footassembly 500 and placed in brushroll holder 905.

The multi-surface wet surface cleaning apparatus 10 can optionally beprovided with a self-cleaning mode. The self-cleaning mode can be usedto clean the brushroll and internal components of the fluid recoverypathway of surface cleaning apparatus 10. In one aspect, themulti-surface wet surface cleaning apparatus 10 is prepared for cleaningby coupling the surface cleaning apparatus 10 to the power source 22,and by filling the storage tray 900 to a predesignated fill level with acleaning fluid or water. The user selects the designated cleaning modefrom the user interface assembly 120. In one example, locking mechanism586 is released to pivot upright assembly 12 rearward and the hard floorcleaning mode is selected from the user interface assembly 120 by theuser. Brushroll 546 is activated by brush motor 503 while suctionmotor/fan assembly 205 provides suction to the suction nozzle assembly580 which draws fluid in storage tray 900 and into the fluid recoverypathway for a predetermined amount of time or until the fluid in storagetray 900 has been depleted. When self-cleaning mode has been completed,surface cleaning apparatus 10 can be returned to the upright and lockedposition in storage tray 900 and brushroll 546 can be removed and storedas previously described.

An aspect of the disclosure also includes a self-cleaning mode. Morespecifically, the surface cleaning apparatus 10 can be docked withinstorage tray 900. A user can fill the reservoir in the storage tray 900with a cleaning fluid or water to a predetermined or predesignated filllevel. It is contemplated that a provided cup can be used to provide theappropriate amount of fluid. Alternatively, a separate reservoirprovided on the storage tray 900 or the surface cleaning apparatus 10may contain the cleaning fluid or water, and when the surface cleaningapparatus 10 is docked within the storage tray 900, a valve can beactuated that allows the reservoir in the storage tray 900 to fill withfluid from the separate reservoir. A momentary switch 960 (FIG. 20) canbe provided on the vacuum 10 for selectively actuating the brush motor503 and the suction motor/fan assembly 205. Selectively actuating caninclude pressing and holding a “Clean-Out” button (not shown) while themachine is docked in the storage tray 900. When the button is pushed,the brushroll 546 is activated by brush motor 503 while the suctionmotor/fan assembly 205 provides suction to the suction nozzle assembly580. This draws fluid from the storage tray 900 into the fluid recoverypathway until the button is released. In this manner, the brushroll 546and the suction motor/fan assembly 205 are operated simultaneously toclean the brushroll 546 and the air path. The battery of the vacuum 10can begin to charge after 1 minute of idle time.

In yet another example of a self-cleaning mode, a control panel 111(FIG. 3) and a PCB 110, 217 (FIG. 4). can automatically energize thepump 226, brush motor 503 and suction motor/fan assembly 205 accordingto a predetermined cycle. For example, when the surface cleaningapparatus 10 is docked within storage tray 900, the storage tray 900 cansend a signal to the surface cleaning apparatus 10 that docking iscomplete and a self-cleaning mode can be employed. A user can actuatethe “Clean-Out” button (not shown), which can include a single press,and the surface cleaning apparatus 10 can automatically dispense acleaning formula or water solution from the clean tank assembly 300 ontothe rotating brushroll 546 and begin to fill the reservoir in thestorage tray 900. The dispensing can take approximately 30 seconds.Next, the suction motor/fan assembly 205 can turn on to extract dirtywater and debris from the reservoir and brushroll, which can takeapproximately 10-15 seconds. The surface cleaning apparatus 10 can shutoff after a predetermined amount of time, which can be approximately 45seconds total and begin to charge after 1 minute of idle time.

While shown and described as an upright vacuum cleaner, it is alsopossible for aspects to include a robot (autonomous) vacuum cleanerconfigured to dock within a storage tray. FIG. 29 is a schematic view ofan autonomous vacuum cleaner 2010. The autonomous vacuum cleaner 2010has been illustrated as a robotic vacuum cleaner that mounts thecomponents various functional systems of the vacuum cleaner in anautonomously moveable unit or housing 2012, including components of avacuum collection system for generating a working air flow for removingdirt (including dust, hair, and other debris) from the surface to becleaned and storing the dirt in a collection space on the vacuumcleaner, and a drive system for autonomously moving the vacuum cleanerover the surface to be cleaned. While not illustrated, the autonomousfloor cleaner 2010 could be provided with additional functional systems,such as a navigation system for guiding the movement of the vacuumcleaner over the surface to be cleaned, a mapping system for generatingand storing maps of the surface to be cleaned and recording status orother environmental variable information, and/or a dispensing system forapplying a treating agent stored on the vacuum cleaner to the surface tobe cleaned. The autonomous or robotic vacuum cleaner can have similarproperties to the autonomous or robotic vacuum cleaner described in U.S.Patent Application Publication No. 2018/0078106, published Mar. 22, 2018and incorporated herein by reference

The vacuum collection system can include a working air path through theunit having an air inlet and an air outlet, a suction nozzle 2014, asuction source 2016 in fluid communication with the suction nozzle 2014for generating a working air stream, and a dirt bin 2018 for collectingdirt from the working airstream for later disposal. The suction nozzle2014 can define the air inlet of the working air path. The suctionsource 2016 can be a motor/fan assembly carried by the unit 2012,fluidly upstream of the air outlet, and can define a portion of theworking air path. The dirt bin 2018 can also define a portion of theworking air path, and include a dirt bin inlet in fluid communicationwith the air inlet. A separator 2020 can be formed in a portion of thedirt bin 2018 for separating fluid and entrained dirt from the workingairstream. Some non-limiting examples of the separator include a cycloneseparator, a filter screen, a foam filter, a HEPA filter, a filter bag,or combinations thereof. The suction source 2016 can be electricallycoupled to a power source, such as a rechargeable battery 2022. In oneexample, the rechargeable battery 2022 can be a lithium ion battery. Auser interface 2024 having at least a suction power switch 2026 betweenthe suction source 2016 and the rechargeable battery 2022 can beselectively closed by the user, thereby activating the suction source2016.

Charging contacts (not shown) for the rechargeable battery 2022 can beprovided on the main housing 2012. The charging contacts can be providedwithin a DC jack 2934. The DC jack 2934 can include a DC jack socket2936 and a DC jack cover 2940 to shield the charging contacts in the DCjack 2934.

A controller 2028 is operably coupled with the various systems of theautonomous vacuum cleaner 2010 for controlling its operation. Thecontroller 2028 is operably coupled with the user interface 2024 forreceiving inputs from a user. The controller 2028 can further beoperably coupled with various sensors 2032, 2034, 2056, 2108 forreceiving input about the environment and can use the sensor input tocontrol the operation of the autonomous vacuum cleaner 2010.

The controller 2028 can, for example, be operably coupled with the drivesystem for directing the autonomous movement of the vacuum cleaner overthe surface to be cleaned. The drive system can include drive wheels2030 for driving the unit across a surface to be cleaned. The sensors2032, 2034 and drive system are described in more detail below.

With reference to FIGS. 29-31, the autonomous vacuum cleaner 2010 caninclude a brush chamber 2036 at a front of the autonomous unit 2012 inwhich an agitator such as a brushroll 2038 is mounted. As used herein,“front” or “forward” and variations thereof are defined relative to thedirection of forward travel of the autonomous vacuum cleaner 2010,unless otherwise specified. The brushroll 2038 is mounted for rotationabout a substantially horizontal axis X, relative to the surface overwhich the unit 2012 moves. A sole plate 2050 can at least partiallyretain the brushroll 2038 in the brush chamber 2036, and has an inletopening defining the suction nozzle 2014. A wiper blade 2044 can beprovided adjacent a trailing edge of the suction nozzle 2014, behind thebrushroll 2038 in order to aid in dust collection. The wiper blade 2044is an elongated blade that generally spans the width of the suctionnozzle 2014, and can be supported by the sole plate 2050.

The brushroll 2038 is mounted at the front of the vacuum cleaner 2010,whereas brushrolls on most autonomous vacuum cleaners are mounted nearmiddle of housing and hidden under an opaque plastic housing. Thehousing 2012 of the illustrated surface cleaning apparatus 10 can beconfigured to accommodate the brushroll 2038 in the forward location,such as by having an overall “D-shape” when viewed from above, with thehousing 2012 having a straight front edge 2040 and a rounded rear edge2042.

An agitator drive assembly 2046 including a separate, dedicated agitatordrive motor 2048 can be provided within the unit 2012 to drive thebrushroll 2038 and can include a drive belt (not shown) that operablyconnects a motor shaft of the agitator drive motor 2048 with thebrushroll 2038 for transmitting rotational motion of the motor shaft tothe brushroll 2038. Alternatively, the brushroll 2038 can be driven bythe suction source 2016.

Due to the D-shaped housing 2012 and position of the brushroll 2038 atthe front of the housing 2012, the brushroll 2038 can be larger thanbrushrolls found on conventional autonomous vacuum cleaners. In oneexample, the brushroll 2038 can be a “full-size” brushroll that istypically found an upright vacuum cleaner. For example, a brushroll asdescribed in U.S. Patent Application Publication No. 2016/016652,published Jun. 16, 2016, is suitable for use on the autonomous vacuumcleaner 2010 shown. The brushroll 2038 can also be removable from theunit 2012 for cleaning and/or replacement.

The brushroll 2038 can have a diameter that is approximately 8× largerand a length that is approximately 2× larger than for a brushroll foundin conventional autonomous vacuum cleaners. The brushroll 2038 can havea diameter of 48 mm and a length of 260.5 mm.

FIG. 32 illustrates a storage tray 2900 for receiving the autonomousvacuum cleaner 2010 for charging the autonomous vacuum cleaner 2010. Thestorage tray 2900 is similar to the storage tray 900; therefore, likeparts will be identified with like numerals increased by 2000, with itbeing understood that the description of the like parts of the storagetray 900 applies to storage tray 2900, unless otherwise noted.

The storage tray 2900 differs from the storage tray 900 with respect tothe charging unit 2920. The charging unit 2920 is located and configuredto charge the autonomous vacuum cleaner 2010. The charging unit 2920 canbe provided with charging contacts within the charger plug (not shown)that correspond, or mate with, the charging contacts on the rechargeablebattery 2022 for the autonomous vacuum cleaner 2010 in the same mannerthan the charging unit 920 can charge the battery 22 on the surfacecleaning apparatus 10. For example, the ramp 2952 on the plug cover 2948on charging unit 2920 can be moved to expose the charger plug when theautonomous vacuum cleaner 2010 is docked in the storage tray 2900. Atthe same time, the DC jack cover 2940 on the rechargeable battery 2022can be moved to expose the charging contacts on the DC jack 2934 suchthat the rechargeable battery 2022 and the storage tray 2900 can beelectrically coupled. The brushroll 2038 can be received in theself-cleaning reservoir 2926 in order to be cleaned as previouslydescribed for the storage tray 900 and the surface cleaning apparatus10.

Benefits of aspects described herein can include shielded contacts, i.e.mechanically-actuated retractable covers or shields that are configuredto cover electrical contacts on the charging tray and the cleaningapparatus when the cleaning apparatus is not docked on the storage tray.In the illustrated examples, the DC jack cover and the tray cover areboth spring-biased to normally block access to the electrical contactswhen the vacuum cleaner, or unit, is not docked on the storage tray 900.The plug cover 948 and the DC jack cover 940 prevent liquid fromcontacting the charging contacts 942 on the surface cleaning apparatus10 and the charger plug 946 on the storage tray 900. This also preventsuser contact with the charging contacts.

FIG. 33 illustrates a cleaning apparatus 3010 according to anotheraspect of the present disclosure and which similar to the earlierdescribed apparatus with it being understood that the description of thelike parts applies unless otherwise noted.

As illustrated herein, the surface cleaning apparatus 3010 can be anupright multi-surface wet vacuum cleaner having a housing that includesan upright handle assembly or body 3012 and a cleaning head or base 3014mounted to or coupled with the upright body 3012 and adapted formovement across a surface to be cleaned. The upright body 3012 caninclude a handle 3016 and a frame 3018. The frame 3018 can include amain support section supporting at least a supply tank 3020 and arecovery tank 3022, and may further support additional components of thebody 3012. The surface cleaning apparatus 3010 can include a fluiddelivery or supply pathway, including and at least partially defined bythe supply tank 3020, for storing cleaning fluid and delivering thecleaning fluid to the surface to be cleaned and a recovery pathway,including and at least partially defined by the recovery tank 3022, forremoving the spent cleaning fluid and debris from the surf ace to becleaned and storing the spent cleaning fluid and debris until emptied bythe user.

The handle 3016 can include a hand grip 3026 and a trigger 3028 mountedto the hand grip 3026, which controls fluid delivery from the supplytank 3020 via an electronic or mechanical coupling with the tank 3020.The trigger 3028 can project at least partially exteriorly of the handgrip 3026 for user access. A spring (not shown) can bias the trigger3028 outwardly from the hand grip 3026. Other actuators, such as a thumbswitch, can be provided instead of the trigger 3028.

The surface cleaning apparatus 3010 can include at least one userinterface 3030, 3032 through which a user can interact with the surfacecleaning apparatus 3010. The user interface 3030 can enable operationand control of the apparatus 3010 from the user's end, and can alsoprovide feedback information from the apparatus 3010 to the user. Theuser interface 3030, 3032 can be electrically coupled with electricalcomponents, including, but not limited to, circuitry electricallyconnected to various components of the fluid delivery and recoverysystems of the surface cleaning apparatus 3010, as described in furtherdetail below.

In the illustrated aspect, the surface cleaning apparatus 3010 includesa human-machine interface (HMI) 3030 having one or more input controls,such as but not limited to buttons, triggers, toggles, keys, switches,or the like, operably connected to systems in the apparatus 3010 toaffect and control its operation. The surface cleaning apparatus IO alsoincludes a status user interface (SUI) 3032 which communicates acondition or status of the apparatus 3010 to the user. The SUI 3032 cancommunicate visually and/or audibly, and can optionally include one ormore input controls. The HMI 3030 and the SUI 3032 can be provided asseparate interfaces or can be integrated with each other, such as in acomposite use interface, graphical user interface, or multimedia userinterface. As shown, the HMI 3030 can be provided at a front side of thehand grip 3026, with the trigger 3028 provided on a rear side of thehand grip 3026, opposite the HMI 3030, and the SUI 3032 can be providedon a front side of the frame 3018, below the handle 3016 and above thebase 3014, and optionally above the recovery tank 3022. In otheraspects, the HMI 3030 and SUI 3032 can be provided elsewhere on thesurface cleaning apparatus 3010.

A moveable joint assembly 3042 can be formed at a lower end of the frame3018 and moveably mounts the base 3014 to the upright body 3012. Thejoint assembly 3042 can alternatively include a universal joint, suchthat the upright body 3012 can pivot about at least two axes relative tothe base 3014. Wiring and/or conduits can optionally supply electricity,air and/or liquid (or other fluids) between the base 3014 and theupright body 3012, or vice versa, and can extend though the jointassembly 3042. The supply and recovery tanks 3020, 3022 can be providedon the upright body 3012. The supply tank 3020 can be mounted to theframe 3018 in any configuration. In the present aspect, the supply tank3020 can be removably mounted at the rear of the frame 3018 such thatthe supply tank 3020 partially rests in the upper rear portion of theframe 3018 and is removable from the frame 3018 for filling. Therecovery tank 3022 can be mounted to the frame 3018 in anyconfiguration. In the present aspect, the recovery tank 3022 can beremovably mounted at the front of the frame 3018, below the supply tank3020, and is removable from the frame 3018 for emptying.

The fluid delivery system is configured to deliver cleaning fluid fromthe supply tank 3020 to a surface to be cleaned, and can include, asbriefly discussed above, a fluid delivery or supply pathway. Thecleaning fluid can include one or more of any suitable cleaning fluids,including, but not limited to, water, compositions, concentrateddetergent, diluted detergent, etc., and mixtures thereof. For example,the fluid can include a mixture of water and concentrated detergent.

As better illustrated in FIG. 34, the supply tank 3020 includes at leastone supply chamber 3046 for holding cleaning fluid and a supply valveassembly 3048 controlling fluid flow through an outlet of the supplychamber 3046. Alternatively, supply tank 3020 can include multiplesupply chambers, such as one chamber containing water and anotherchamber containing a cleaning agent. For a removable supply tank 3020,the supply valve assembly 3048 can mate with a receiving assembly on theframe 3018 and can be configured to automatically open when the supplytank 3020 is seated on the frame 3018 to release fluid to the fluiddelivery pathway.

The recovery system is configured to remove spent cleaning fluid anddebris from the surface to be cleaned and store the spent cleaning fluidand debris on the surface cleaning apparatus 3010 for later disposal,and can include, as briefly discussed above, a recovery pathway. Therecovery pathway can include at least a dirty inlet 3050 and a clean airoutlet 3052 (FIG. 33). The pathway can be formed by, among otherelements, a suction nozzle 3054 defining the dirty inlet, a suctionsource 3056 in fluid communication with the suction nozzle 3054 forgenerating a working air stream, the recovery tank 3022, and at leastone exhaust vent defining the clean air outlet 3052.

The suction nozzle 3054 can be provided on the base 3014 and can beadapted to be adjacent the surface to be cleaned as the base 3014 movesacross a surface. A brushroll 3060 can be provided adjacent to thesuction nozzle 3054 for agitating the surface to be cleaned so that thedebris is more easily ingested into the suction nozzle 3054. While ahorizontally-rotating brushroll 3060 is shown herein, in some aspects,dual horizontally-rotating brushrolls, one or more vertically-rotatingbrushrolls, or a stationary brush can be provided on the apparatus 3010.

The suction nozzle 3054 is further in fluid communication with therecovery tank 3022 through a conduit 3062. The conduit 3062 can passthrough the joint assembly 3042 and can be flexible to accommodate themovement of the joint assembly 3042.

The suction source 3056, which can be a motor/fan assembly including avacuum motor 3064 and a fan 3066, is provided in fluid communicationwith the recovery tank 3022. The suction source 3056 can be positionedwithin a housing of the frame 3018, such as above the recovery tank 3022and forwardly of the supply tank 3020. The recovery system can also beprovided with one or more additional filters upstream or downstream ofthe suction source 3056. For example, in the illustrated aspect, apre-motor filter 3068 is provided in the recovery pathway downstream ofthe recovery tank 3022 and upstream of the suction source 3056. Apost-motor filter (not shown) can be provided in the recovery pathwaydownstream of the suction source 3056 and upstream of the clean airoutlet 3052.

The base 3014 can include a base housing 3070 supporting at least someof the components of the fluid delivery system and fluid recoverysystem, and a pair of wheels 3072 for moving the apparatus 3010 over thesurface to be cleaned. The wheels 3072 can be provided on a rearwardportion of the base housing 3070, rearward of components such as thebrushroll 3060 and suction nozzle 3054. A second pair of wheels 3074 canbe provided on the base housing 3070, forward of the first pair ofwheels 3072.

Electrical components of the surface cleaning apparatus 3010, includingthe vacuum motor 3064, the pump 3094, and the brush motor 3096 for thebrushroll 3060, can be electrically coupled to a power source such as abattery 3372 or a power cord plugged into a household outlet. In theillustrated aspect, the power source includes a rechargeable battery3372.

In one example, the battery 3372 can be a lithium ion battery. Inanother exemplary arrangement, the battery 3372 can include a userreplaceable battery. As discussed above, the power input control 3034which controls the supply of power to one or more electrical componentsof the apparatus 3010, and in the illustrated aspect controls the supplyof power to at least the SUI 3032, the vacuum motor 3064, the pump 3094,and the brush motor 3096. The cleaning mode input control 3036 cyclesthe apparatus 3010 between a hard floor cleaning mode and a carpetcleaning mode. In one example of the hard floor cleaning mode, thevacuum motor 3064, the pump 3094, and the brush motor 3096 areactivated, with the pump 3094 operating at a first flow rate. In thecarpet cleaning mode, the vacuum motor 3064, the pump 3094, and thebrush motor 3096 are activated, with the pump 3094 operating at a secondflow rate which is greater than the first flow rate. The self-cleaningmode input control 3040 initiates a self-cleaning mode of operation, oneaspect of which is described in detail below. Briefly, during theself-cleaning mode a cleanout cycle can run in which cleaning liquid issprayed on the brushroll 3060 while the brushroll 3060 rotates. Liquidis extracted and deposited into the recovery tank 3022, thereby alsoflushing out a portion of the recovery pathway.

With reference to FIG. 34, the controller 3308 can be provided atvarious locations on the apparatus 3010, and in the illustrated aspectis located in the upright body 3012, within the frame 3018, and isintegrated with the SUI 3032. Alternatively, the controller 3308 can beintegrated with the HMI 3030 (FIG. 33), or can be separate from both theHMI 3030 and SUI 3032.

The battery 3372 can be located within a battery housing 3374 located onthe upright body 3012 or base 3014 of the apparatus, which can protectand retain the battery 3372 on the apparatus 3010. In the illustratedaspect, the battery housing 3374 is provided on the frame 3018 of theupright body 3012. Optionally, the battery housing 3374 can be locatedbelow the supply tank 3020 and/or rearwardly of the recovery tank 3022.

Referring to FIG. 35, the surface cleaning apparatus 3010 can optionallybe provided with a storage tray 3380 that can be used when storing theapparatus 3010. The storage tray 3380 can be configured to receive thebase 3014 of the apparatus 3010 in an upright, stored position. Thestorage tray 3380 can further be configured for further functionalitybeyond simple storage, such as for charging the apparatus 3010 and/orfor self-cleaning of the apparatus 3010.

Referring to FIG. 36, the storage tray 3380 functions as a dockingstation for recharging the battery 3372 of the apparatus 3010. Thestorage tray 3380 can optionally have at least one charging contact3382, and at least one corresponding charging contact 3384 can beprovided on the apparatus 3010, such as on the exterior of the batteryhousing 3374. When operation has ceased, the apparatus 3010 can belocked upright and placed into the storage tray 3380 for recharging thebattery 3372. When the apparatus 3010 is removed from the storage tray3380, one or both of the charging contacts 3382, 3384 can be shielded,as described in further detail below.

A charging unit 3386 is provided on the storage tray 3380 and includesthe charging contacts 3382. The charging unit 3386 can electricallycouple with the battery 3372 when the base 3014 of the apparatus 3010 isdocked with the storage tray 3380. The charging unit 3386 can beelectrically coupled to a power source including, but not limited to, ahousehold outlet. In one example, a cord 388 can be coupled with thecharging unit 3386 to connect the storage tray 3380 to the power source.The battery housing 3374 and the charging unit 3386 of the storage tray3380 can possess complementary shapes, with the battery housing 3374fitting against the charging unit 3386 to help support the apparatus3010 on the storage tray 3380. In the illustrated aspect, the batteryhousing 3374 can include a socket 3390 containing the charging contacts3384 and the charging unit 3386 can be at least partially received bythe socket 3390 when the apparatus 3010 is docked with the tray 3380.

FIG. 37 is a rear perspective view of a lower portion of the uprightbody 3012 showing a cross-section through the charging contact 3384 ofthe battery 3372. A contact casing 3392 can extend downwardly within thesocket 3390, and includes the charging contact 3384, which isillustrated as DC connector or socket. The charging contact 3384 orsocket can be normally covered, or closed, by a retractable chargingcontact cover 3394, also referred to herein as battery-side cover.

The battery-side cover 3394 can be slidably mounted to or within thecasing 3392 and can be biased to the normally covered position by aspring 3396. When the battery-side cover 3394 is in the closed position,the battery-side cover 3394 shields the charging contact 3384 such thatliquid cannot enter the charging contact 3384 or casing 3392.

The battery-side cover 3394 can include a ramp 3398 against which aportion of the storage tray 3380 presses to move the cover 3394 touncover the charging contact 3384 against the biasing force of thespring 3396. It is noted that while a ramp 3398 is shown, the apparatus3010 can include any suitable mating feature configurable to move thecover 3394 upon docking, such as a cam or a rack and pinion gear, forexample. Alternatively, a linear actuator can be incorporated to movethe cover 3394 to the open position upon docking.

Referring to FIG. 38, the charging contact 3382 of the charging unit3386, which is illustrated as DC connector or plug, can be normallycovered, or closed, by a retractable charging contact cover 3400, alsoreferred to herein as tray-side cover. A bracket 3402 can be provided inthe charging unit to mount the charging contact or plug 3382 and thecover 3400. The tray-side cover can be biased to the normally coveredposition by springs 3404, 3406, which bias the cover 3400 rearwardly andupwardly. When the tray-side cover 3400 is in the closed position, thetray-side cover 3400 shields the charging contact 3382 such that liquidcannot enter the charging contact 3382 or charging unit 3386.

The tray-side cover 3400 can include a ramp 3408 against which a portionof the apparatus 3010 presses to move the cover 3400 to uncover thecharging contact 3382 against the biasing force of the springs 3404,3406. It is noted that while a ramp 3408 is shown, the apparatus 3010can include any suitable mating feature configurable to move the cover3400 upon docking, such as a cam or a rack and pinion gear, for example.Alternatively, a linear actuator can be incorporated to move the cover3400 to the open position upon docking.

Docking the apparatus 3010 with the storage tray 3380 can automaticallymove the covers 3394, 3400 to an uncovered or open position, an exampleof which is shown in FIGS. 39-41, in which the charging contacts 3382,3384 can be coupled, i.e. by the socket 3384 receiving the plug 382. Inone aspect, in order to dock the apparatus 3010 within the storage tray3380 for charging, the apparatus 3010 is lowered into the storage tray3380 as shown in FIG. 39 and the casing 3392 pushes against the ramp3408 on the tray-side cover 3400, sliding the cover 3400 forwardly toexpose the charging contact or plug 3382. As the apparatus 3010continues to be lowered onto the storage tray 3380, the exposed plug3382 presses against the ramp 3398 on the battery-side cover 3394, asshown in FIG. 40, sliding the cover 3394 laterally to expose thecharging contact or socket 3384. Continued lowering of the apparatus3010 plugs the plug 3382 into the socket 3384, as shown in FIG. 41. Thecharging plug 3382 on the storage tray 3380 and socket 3384 on theapparatus 3010 become fully engaged, or electrically connected, when theapparatus 3010 is fully seated on the storage tray 3380.

Referring back to FIGS. 35-37, during use, the apparatus 3010 can getvery dirty, particularly in the brush chamber and extraction pathway,and can be difficult for the user to clean. The storage tray 3380 canfunction as a cleaning tray during a self-cleaning mode of the apparatus3010, which can be used to clean the brushroll 3060 and internalcomponents of the fluid recovery pathway of apparatus 3010.Self-cleaning using the storage tray 3380 can save the user considerabletime and may lead to more frequent use of the apparatus 3010. Thestorage tray 3380 can optionally be adapted to contain a liquid for thepurposes of cleaning the interior parts of apparatus 3010 and/orreceiving liquid that may leak from the supply tank 3020 while theapparatus 10 is not in active operation. When operation has ceased, theapparatus 3010 can be locked upright and placed into the storage tray3380 for cleaning. The apparatus 3010 is prepared for self-cleaning byfilling the storage tray 3380 to a predesignated fill level with acleaning liquid, such as water. The user can select the self-cleaningmode via the input control 3040 (FIG. 33).

In one example, during the self-cleaning mode, the vacuum motor 3064 andbrush motor 3096 are activated, which draws cleaning liquid in thestorage tray 3380 into the fluid recovery pathway. The self-cleaningmode can be configured to last for a predetermined amount of time oruntil the cleaning liquid in storage tray 3380 has been depleted.Example of self-cleaning cycles and storage trays are disclosed in U.S.patent application No. 15/994,040, filed May 31, 2018, which isincorporated herein by reference in its entirety.

The tray 3380 can physically support the entire apparatus 3010. Morespecifically, the base 3014 can be seated in the tray 3380. The tray3380 can have a recessed portion in the form of a sump 3410 in registerwith at least one of the suction nozzle 3054 or brushroll 3060.Optionally, the sump 3410 can sealingly receive the suction nozzle 3054and brushroll 3060, such as by sealingly receiving the brush chamber3104. The sump 3410 can fluidly isolate, or seal, the suction nozzle3054 and fluid distributor (not shown) within the brush chamber 3104 tocreate a closed loop between the fluid delivery and fluid extractionsystems of the apparatus 3010. The sump 3410 can collect excess liquidfor eventual extraction by the suction nozzle 3054. This also serves toflush out a recovery pathway between the suction nozzle 3054 and therecovery tank 3022.

FIG. 42 is a perspective view of the storage tray 3380. The tray 3380can include guide walls 3412 extending upwardly and configured to alignthe base 3014 (FIG. 36) within the tray 3380. A rear portion of the tray3380 can include wheel holders 3414 for receiving the rear wheels 3072of the apparatus 3010. The wheel holders 3414 can be formed as a recess,or groove in the storage tray 3380, and can be provided on oppositelateral sides of the charging unit 3386.

Optionally the storage tray 3380 can include a removable accessoryholder 3416 for storing one or more accessories for the apparatus 3010.The accessory holder 3416 can be provided on an exterior side wall ofthe tray 3380, and can be removably mounted to the tray 3380. The tray380 can optionally be provided with a mounting location on eitherlateral side of the tray 3380 to allow the user some flexibility inwhere the accessory holder 3416 is attached. FIG. 42 includes anaccessory holder 3416 in phantom line showing one optional alternativemounting location. The mounting locations can include a retention latch,sliding lock, clamp, brace, or any other mechanism in which to secureaccessory holder 3416 on the storage tray 3380 Alternatively, storagetray 3380 can be configured with a non-removable or integral accessoryholder 3416.

The illustrated accessory holder 3416 can removably receive one or morebrushrolls 3060 and/or one of more filters 3276 for the purposes ofstorage and/or drying. Accessory holder 3416 can include one or morebrushroll slots 3418 to securely receive brushrolls 3060 in a verticalfixed position for drying and storage. Brushroll slots 3418 can be fixedor adjustable and include clamps, rods, or molded receiving positionsthat can accommodate brushroll 3060 with or without the dowel 3110inserted. Accessory holder 3416 can include at least one filter slot3420 to securely receive filter 3276 in a vertical fixed position fordrying and storage. Alternatively, accessory holder 3416 can store thebrushrolls 3060 and filter 3276 in a variety of other positions.

FIG. 43 is a block diagram for the apparatus 3010, showing a conditionwhen the apparatus 3010 is docked with the storage tray 3380 forrecharging. The apparatus 3010 includes a battery charging circuit 3430that controls recharging of the battery 3372. When the apparatus 3010 isdocked with the storage tray 3380 the battery charging circuit 3430 isactive and the battery 3372 is charged. In at least some aspects of thestorage tray 3380, the tray 3380 includes power cord 388 plugged into ahousehold outlet, such as by a wall charger 3432 having, for example anoperating power of 35 W. However, during a self-cleaning cycle duringwhich the vacuum motor 3064, pump 3094, and brush motor 3096 are allenergized, the required power draw can far exceed the operating power ofthe wall charger. In one example, the required power draw for the vacuummotor 3064, pump 3094, and brush motor 3096 can be 200-250 W. Theapparatus 3010 can include a battery monitoring circuit 3432 formonitoring the status of the battery 3372 and individual battery cellscontained therein. Feedback from the battery monitoring circuit 3432 isused by the controller 3308 to optimize the discharging and rechargingprocess, as well as for displaying battery charge status on the SUI3032.

Referring to FIG. 44, the block diagram shows a condition when theapparatus 3010 is docked with the storage tray 3380 in the self-cleaningmode. Depressing the self-cleaning mode input control 3040 disables orshuts off the battery charging circuit 3430, and allows the apparatus3010 to energize and be powered by the onboard battery 3472. Theapparatus 3010 then automatically cycles through the self-cleaning mode,and during this cycle the battery charging circuit 3430 remainsdisabled, i.e. the battery 3372 does not recharge during theself-cleaning mode. This operational behavior is beneficial because ifthe battery charging circuit 3430 is not disabled and power not suppliedby the battery 3472 during the self-cleaning mode, a much highercapacity and more expensive wall charger is required to power theapparatus during the self-cleaning mode.

FIG. 45 depicts one aspect of the disclosure of a self-cleaning method3440 for the apparatus 3010 using the storage tray 3380. In use, a userat 3442 docks the apparatus 3010 with the storage tray 3380. The dockingmay include parking the base 3014 on the cleaning tray 3380 and creatinga sealed cleaning pathway between the brush chamber 3104 and the suctionnozzle 3054.

At step 3444, the charging circuit 3430 is enabled when the apparatus3010 is docked with the tray 3380 and the charging contacts 3382, 3384couple. When the charging circuit 3430 is enabled, the battery 3372 maybegin being recharged.

At step 3446, the self-cleaning cycle is initiated, with the userinitiating the cycle by pressing the self-cleaning mode input control3040 on the SUI 3032. The self-cleaning cycle may be locked-out by thecontroller 3308 when the apparatus 3010 is not docked with the storagetray 3380 to prevent inadvertent initiation of the self-cleaning cycle.

At step 3448, upon initiation of the self-cleaning cycle, such as uponthe user pressing the self-cleaning mode input control 3040, thecharging circuit 3430 is disabled, i.e. the battery 3372 ceases torecharge.

Pressing the input control 3040 at step 3446 can energize one or morecomponents of the apparatus 3010 that are powered by the onboard battery3472. The self-cleaning cycle may begin at step 3450 in which the pump3094 is active to deliver cleaning solution from the supply tank 3020 tothe distributor (not shown) that sprays the brushroll 3060. During step3450, the brush motor 3096 can also activate to rotate the brushroll3060 at while applying cleaning fluid to the brushroll 3060 to flush thebrush chamber 3104 and cleaning lines, and wash debris from thebrushroll 3060. The self-cleaning cycle may use the same cleaning fluidnormally used by the apparatus 3010 for surface cleaning, or may use adifferent detergent focused on cleaning the recovery system of theapparatus 3010.

The vacuum motor can be actuated during or after step 3450 to extractthe cleaning fluid via the suction nozzle 3054. During extraction, thecleaning fluid and debris from the sump 3410 in the tray 3380 is suckedthrough the suction nozzle 3054 and the downstream fluid recovery path.The flushing action also cleans the entire fluid recovery path of theapparatus 3010, including the suction nozzle 3054 and downstreamconduits.

At step 3452, the self-cleaning cycle ends. The end of the self-cleaningcycle can be time-dependent, or can continue until the recovery tank3022 is full or the supply tank 3020 is empty. For a timed self-cleaningcycle, the pump 3094, brush motor 3096, and vacuum motor 3064 areenergized and de-energized for predetermined periods of time.Optionally, the pump 3094 or brush motor 3096 can pulse on/offintermittently so that any debris is flushed off of the brushroll 3060and extracted into the recovery tank 3022. Optionally, the brushroll3060 can be rotated at slower or faster speeds to facilitate moreeffective wetting, shedding of debris, and/or spin drying. Near the endof the cycle, the pump 3094 can de-energize to end fluid dispensingwhile the brush motor 3096 and vacuum motor 3064 can remain energized tocontinue extraction. This is to ensure that any liquid remaining in thesump 3410, on the brushroll 3060, or in the fluid recovery path iscompletely extracted into the recovery tank 3022. After the end of theself-cleaning cycle, the changing circuit 3430 is enabled to continue torecharging the battery 3472 at step 3454.

To the extent not already described, the different features andstructures of the various embodiments of the invention, may be used incombination with each other as desired, or may be used separately. Thatone vacuum cleaner is illustrated herein as having all of these featuresdoes not mean that all of these features must be used in combination,but rather done so here for brevity of description. Furthermore, whilethe surface cleaning apparatus 10 shown herein has an uprightconfiguration, the vacuum cleaner can be configured as a canister orportable unit. For example, in a canister arrangement, foot componentssuch as the suction nozzle assembly 580 and brushroll can be provided ona cleaning head coupled with a canister unit. Still further, the vacuumcleaner can additionally have steam delivery capability. Thus, thevarious features of the different embodiments may be mixed and matchedin various vacuum cleaner configurations as desired to form newembodiments, whether or not the new embodiments are expressly described.

Further aspects of the disclosure are provided by the subject matter ofthe following clauses:

A cleaning system, comprising a surface cleaning apparatus, comprising ahousing adapted for contacting a surface of a surrounding environment tobe cleaned a suction source, a suction nozzle assembly provided on thehousing and defining a suction nozzle in fluid communication with thesuction source, and a rechargeable battery mounted within the housingand electrically coupled to the suction source and configured to enablecordless operation of the surface cleaning apparatus and an apparatuscharging contact electrically coupled with the rechargeable battery anda cleaning tray, comprising a tray body configured to at least partiallyunderlie at least a portion of the housing, a charging unit operablycoupled to the cleaning tray and electrically couplable to a powersource configured to operably couple and charge the rechargeable batteryof the surface cleaning apparatus, the charging unit comprising: atleast one tray charging contact located on a portion of the tray body;and a moveable tray cover operably coupled to the tray body andconfigured to move between a covered position wherein the at least onetray charging contact is covered and an opened position wherein the atleast one tray charging contact is accessible.

The cleaning system of any preceding clause wherein the apparatuscharging contact includes a DC socket.

The cleaning system of any preceding clause wherein the surface cleaningapparatus further comprises a moveable battery cover operably coupled tothe housing and moveable between a covered position wherein theapparatus charging contact is covered and an opened position wherein theapparatus charging contact is accessible.

The cleaning system of any preceding clause wherein the moveable batterycover is slidably mounted to a battery casing at least partiallyretaining the rechargeable battery to the housing of the surfacecleaning apparatus.

The cleaning system of any preceding clause further comprising a biasingelement located between the moveable battery cover and the batterycasing and providing a force to bias the moveable battery cover to thecovered position.

The cleaning system of any preceding clause wherein the moveable batterycover includes a first ramped surface.

The cleaning system of any preceding clause wherein the moveable traycover further comprises a mating surface upon which the first rampedsurface applies force when the surface cleaning apparatus is docked withthe cleaning tray.

The cleaning system of any preceding clause wherein the mating surfaceis a second ramped surface extending upwards from the moveable traycover.

The cleaning system of any preceding clause wherein the power source isa household outlet.

The cleaning system of any preceding clause wherein the cleaning trayfurther comprises at least one biasing element operably coupled to themoveable tray cover and configured to provide a biasing force on themoveable tray cover towards the covered position.

The cleaning system of any preceding clause wherein the at least onebiasing element comprises two springs providing biasing force in aplurality of directions.

The cleaning system of any preceding clause wherein the surface cleaningapparatus further comprises a fluid delivery and recovery system,comprising: a fluid supply tank adapted to hold a supply of fluid, afluid dispenser in fluid communication with the fluid supply tank, and arecovery tank in fluid communication with the suction nozzle.

The cleaning system of any preceding clause wherein the surface cleaningapparatus further comprises an agitator located within the suctionnozzle.

The cleaning system of any preceding clause wherein the tray bodyfurther comprises a recessed portion configured to receive the suctionnozzle and the agitator.

The cleaning system of any preceding clause wherein the cleaning trayfurther comprises an insert selectively received within at least aportion of the recessed portion and configured to engage the agitator.

The cleaning system of any preceding clause wherein a sealed cleaningpathway is formed to the recovery tank and fluid is dispensed from thefluid dispenser within a brush chamber of the housing to wash out thebrush chamber, nozzle, and an airflow pathway between the suction nozzleand recovery tank.

The cleaning system of any preceding clause wherein the housing of thesurface cleaning apparatus further comprises a base receivable withinthe tray body.

The cleaning system of any preceding clause wherein the tray bodyfurther comprises guide walls extending upwardly and configured to alignthe base within the tray body.

The cleaning system of any preceding clause wherein the tray bodyfurther comprises wheel wells configured to receive wheels of thesurface cleaning apparatus.

The cleaning system of any preceding clause wherein the surface cleaningapparatus is one of an upright vacuum cleaner, a multi-surface floorcleaner, a robotic vacuum, a canister vacuum, a portable deep cleaner,an upright deep cleaner, or a commercial extractor.

A cleaning tray for a surface cleaning apparatus having a body and abase assembly with a suction nozzle and an agitator, comprising a traybody configured to at least partially underlie the base and at least oneof the suction nozzle or the agitator, a charging unit operably coupledto the cleaning tray and electrically couplable to a power sourceconfigured to operably couple and charge a battery of the surfacecleaning apparatus, the charging unit comprising at least one traycharging contact located on a portion of the tray body; and a moveabletray cover operably coupled to the tray body and configured to movebetween a covered position wherein the at least one tray chargingcontact is covered and an opened position wherein the at least one traycharging contact is accessible.

The cleaning tray of any preceding clause wherein the power source is ahousehold outlet.

The cleaning tray of any preceding clause further comprising at leastone biasing element operably coupled to the moveable tray cover andconfigured to provide a biasing force on the moveable tray cover towardsthe covered position.

The cleaning tray of any preceding clause wherein the at least onebiasing element comprises two springs providing biasing force in aplurality of directions

The cleaning tray of any preceding clause wherein the moveable traycover further comprises a mating surface upon which a portion of thesurface cleaning apparatus applies force when docked.

The cleaning tray of any preceding clause wherein the mating surface isa ramped surface extending upwards from the moveable tray cover.

The cleaning tray of any preceding clause wherein the tray body furthercomprises a recessed portion configured to receive the suction nozzleand the agitator and the tray body having guide walls extending upwardlyand configured to align the base assembly of the surface cleaningapparatus within the cleaning tray.

The cleaning tray of any preceding clause further comprising an insertselectively received within at least a portion of the recessed portionand configured to engage the agitator.

The cleaning tray of any preceding clause wherein a sealed cleaningpathway is formed to a downstream recovery container within the surfacecleaning apparatus and fluid is dispensed from a distributor within abrush chamber of the base to wash out the brush chamber, nozzle, and anairflow pathway between the suction nozzle and recovery container.

While the invention has been specifically described in connection withcertain specific embodiments thereof, it is to be understood that thisis by way of illustration and not of limitation. Reasonable variationand modification are possible with the scope of the foregoing disclosureand drawings without departing from the spirit of the invention which,is defined in the appended claims. Hence, specific dimensions and otherphysical characteristics relating to the embodiments disclosed hereinare not to be considered as limiting, unless the claims expressly stateotherwise.

What is claimed is:
 1. A surface cleaning apparatus, comprising: ahousing including an upright assembly with a battery housing and ahandle, and a base assembly moveably mounted to the upright assembly viaa joint assembly, the base assembly including a nozzle assemblyselectively coupled to the base assembly, the nozzle assembly comprisinga suction nozzle; a recovery system comprising the suction nozzle, asuction source in fluid communication with the suction nozzle forgenerating a working air stream, and a recovery tank that is selectivelyremovable from the upright assembly; a brushroll provided with the baseassembly, the brushroll removable from the base assembly, when thebrushroll is provided with the based assembly, the brushroll isrotatable about a brushroll axis; a brushroll motor provided in the baseassembly and operably coupled to the brushroll, the brushroll motoradapted to provide a driving force to rotate the brushroll about thebrushroll axis; a fluid delivery system comprising a supply tank that isselectively removable from the upright assembly, a pump, and at leastone fluid distributor, the at least one fluid distributor provided onthe base assembly; a rechargeable battery selectively receivable withinthe battery housing such that it is located vertically lower than atleast one of the supply tank or the recovery tank, the rechargeablebattery configured to selectively supply power to the suction source,the pump, and the brushroll motor; and at least one charging contactprovided on an exterior of the battery housing.
 2. The surface cleaningapparatus of claim 1 wherein the battery housing includes a socketcontaining the at least one charging contact and the socket is providedat a lower end of the battery housing.
 3. The surface cleaning apparatusof claim 1 wherein the recovery tank comprises: a recovery containerforming a collection chamber for the recovery system, the recoverycontainer defining an open top; a tank inlet formed at a lower end ofthe recovery container; a hollow standpipe extending upwardly from thetank inlet and comprising a pipe outlet at an upper end thereof; a lidassembly sized for receipt on the recovery container and at leastpartially enclosing the open top, the lid assembly including an airoutlet of the recovery tank and supporting a filter at the air outlet;and a strainer assembly including a plurality of apertures, the strainerassembly having a portion that mounts to the hollow standpipe.
 4. Thesurface cleaning apparatus of claim 3, further comprising a latchassembly provided on a forward side of the lid assembly, the latchassembly including a latch body biased via a spring toward a latchedposition wherein a protrusion of the latch body is received in a recessof the upright assembly.
 5. The surface cleaning apparatus of claim 4wherein the latch body includes an integral latch button adapted to bepressed by a user to move the protrusion out of the recess and theintegral latch button is held within a bracket and wherein the integrallatch button is accessible via an aperture on a front side of the lidassembly.
 6. The surface cleaning apparatus of claim 5 wherein a handgrip integral with a wall of the recovery container is provided belowthe latch assembly and the filter comprises a pleated filter supportedby the lid assembly and wherein the latch assembly is forward of pleatedfilter.
 7. The surface cleaning apparatus of claim 3, further comprisinga shut-off valve adapted to interrupt suction via the air outlet in thelid assembly when fluid in the recovery container reaches apredetermined level.
 8. The surface cleaning apparatus of claim 1wherein the handle comprises a handle pipe having a lower end receivedin a main support section of the upright assembly, the recovery tank isbelow the supply tank and the suction source is provided on the uprightassembly and the recovery tank is below the suction source.
 9. Thesurface cleaning apparatus of claim 1, further comprising: ahuman-machine interface on the handle and comprising at least one inputcontrol; and a status user interface adapted to communicate a conditionor status of the surface cleaning apparatus to a user.
 10. The surfacecleaning apparatus of claim 9 wherein the handle comprises a hand grip,and the at least one input control comprises a power input control onthe hand grip and wherein the at least one input control is adapted tocontrols a supply of power to one or more electrical components and acleaning mode input control on the hand grip adapted to select at leastone mode of operation.
 11. The surface cleaning apparatus of claim 10,further comprising a fluid dispenser actuator located on the hand gripand operably coupled to the fluid delivery system to control adispensing of fluid.
 12. The surface cleaning apparatus of claim 11wherein the status user interface comprises a display, the displayincluding multiple status indicators including a battery status and aself-cleaning status.
 13. The surface cleaning apparatus of claim 1,further comprising: a self-cleaning mode input control; and a controlleradapted to receive a signal from the self-cleaning mode input controland control the operation of the fluid delivery system and recoverysystem, wherein the controller is configured to execute an automaticcleanout cycle for the self-cleaning mode of operation upon actuation ofthe self-cleaning mode input control.
 14. The surface cleaning apparatusof claim 1 wherein the joint assembly couples the upright assembly tothe base assembly for movement about at least two axes relative to thebase assembly.
 15. The surface cleaning apparatus of claim 14 whereinthe suction nozzle is in fluid communication with the recovery tankthrough a conduit, wherein the conduit passes through the joint assemblyand is flexible to accommodate movement of the joint assembly about theat least two axes.
 16. The surface cleaning apparatus of claim 15wherein the recovery tank is provided below the supply tank and isremovably mounted at a front of the upright assembly, the recovery tankhaving a tank inlet at a lower end thereof that is configured to alignwith the conduit to establish fluid communication between the baseassembly and the recovery tank.
 17. The surface cleaning apparatus ofclaim 1 wherein the upright assembly comprises: a first tank receiverfor receiving the supply tank, the supply tank having anexternally-facing surface which forms a first external surface of thesurface cleaning apparatus when the supply tank is seated in the firsttank receiver; and a second tank receiver for receiving the recoverytank, the recovery tank having an externally-facing surface which formsa second external surface of the surface cleaning apparatus when therecovery tank is seated in the second tank receiver, and the recoverytank has an integral hand grip provided on the externally-facing surfacethereof
 18. The surface cleaning apparatus of claim 1, furthercomprising: a first wiper configured to interface with a portion of thebrushroll; and a second wiper mounted to the base assembly behind thebrushroll and configured to at least selectively contact a surface to becleaned as the base assembly moves across the surface to be cleaned inan on operational position.
 19. The surface cleaning apparatus of claim1, further comprising a nozzle latch releasably securing the nozzleassembly to the base assembly, wherein the nozzle latch is selectivelyreceived in a latch receiver on the base assembly and biased to alatched position.
 20. The surface cleaning apparatus of claim 1 whereinthe brushroll comprises a dowel defining a first distal end and a seconddistal end and further comprising a protruding member located at thefirst distal end and operably coupled to the dowel and freely rotatableabout the brushroll axis, the protruding member receivable within amating portion of the base assembly to mount the brushroll to the baseassembly.